How is this different from the string category's Line Randomizer?

Line Randomizer only splits on newlines. List Randomizer accepts a configurable separator, so it also works with comma-separated lists or a custom delimiter, useful when your list isn't formatted one item per line.

What shuffle algorithm does this use?

A Fisher-Yates shuffle, the standard algorithm for producing an unbiased random permutation where every possible ordering is equally likely.

Why does the output start blank and then appear?

The shuffle only runs after the page has fully loaded in your browser, so the server-rendered page and the first client render match exactly (avoiding a hydration mismatch). Once mounted, the shuffled result appears immediately, and you can click Shuffle Again for a new order.

List Randomizer - Shuffle a List Online

Overview

Introduction

Randomizing the order of a list is handy for anything from shuffling raffle entries to randomizing quiz question order.

This tool shuffles list items with a proper Fisher-Yates shuffle and lets you re-roll instantly with a button, no need to retype or reload.

What Is List Randomizer?

A list transformer that randomly reorders items using the Fisher-Yates shuffle algorithm, a well-known unbiased shuffling method.

Unlike the string category's newline-only Line Randomizer, this tool accepts a configurable separator so comma-separated and custom-delimited lists shuffle correctly too.

How List Randomizer Works

The list is split into items using the resolved separator, then shuffled in place with a Fisher-Yates pass that walks the array backward, swapping each item with a randomly chosen earlier (or equal) position.

The shuffle only executes client-side after the component has mounted, and a Shuffle Again button bumps an internal refresh key to trigger a fresh shuffle on demand.

When To Use List Randomizer

Use it to randomize the order of raffle or giveaway entries, quiz questions, or playlist tracks.

It's also useful whenever you need a quick, unbiased random ordering of any list of items for testing or demonstration purposes.

Often used alongside List Sorter, List Reverser and List Item Picker.

Features

Advantages

Fisher-Yates produces a mathematically unbiased random permutation.
Configurable separator supports more list formats than the newline-only Line Randomizer.
Instant re-shuffling via the Shuffle Again button without losing your original list.

Limitations

Requires at least two items to shuffle; a single-item list has nothing to reorder.
Uses `Math.random()`, which is not cryptographically secure; do not use this for anything requiring a provably fair or tamper-resistant shuffle.
Each shuffle is independent; there is no seeded/reproducible mode.

Examples

Shuffling a five-item list

Input

one
two
three
four
five

Output

three
five
one
four
two

One possible random ordering; the exact result varies on every shuffle.

Shuffling a comma-separated list

Input

a,b,c,d

Output

d, b, a, c

Comma separator mode splits on commas and rejoins the shuffled result with ", ".

Best Practices & Notes

Best Practices

Click Shuffle Again as many times as you like to get a different random order without re-entering your list.
Use List Item Picker instead if you only need to select one random item rather than reorder the whole list.
Don't rely on this for security-sensitive randomness; it uses standard, non-cryptographic `Math.random()`.

Developer Notes

The shuffle is a standard Fisher-Yates implementation iterating from the end of the array to the start, swapping each element with one at a random index `j` where `0 <= j <= i`; the component gates the shuffle behind `useHasMounted()` and re-runs it via a `refreshKey` state bump on each Shuffle Again click, to keep server and client renders in sync.

List Randomizer Use Cases

Randomizing raffle or giveaway entry order
Shuffling quiz or flashcard question order
Generating a quick random playlist or task order

Common Mistakes

Expecting a seeded, reproducible shuffle; each run uses fresh randomness with no seed option.
Using this for cryptographic or fairness-critical randomness, where `Math.random()` is not appropriate.
Trying to shuffle a single-item list and being surprised by the clear error message.

Tips

Use the comma or custom separator mode if your list isn't formatted one item per line.
Pair with List Item Counter Adder afterward to number the freshly shuffled order.

List Randomizer